PCI1131 PCI-TO-CARDBUS CONTROLLER UNIT XCPS011 is a PCI-TO-CARDBUS CONTROLLER UNIT produced by National Semiconductor Corporation. It supports PCI Local Bus Specification 2.1 and can support 3.3-V/5-V PC Card16 Cards and 3.3-V CardBus Cards. This product also supports the 1995 PC Card-Standard and uses low-power advanced submicron CMOS technology.